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Test your basic knowledge |
Dairy Cattle And Reproduction
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Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 26 hours after estrus begins
ewe estrus
ewe ovulation
mastitis
growth lost from castration methods (knife & band)
2. Look for infection - split - and rupture of the penis
penis and prepuce observation (BSE)
age and castration
epididymis: definition - 3 parts - 4 functions
hormones
3. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
Follical Stimulating in females
retractor muscles
age and castration
van deferens
4. Superior genes are _______ to multiply
burdizzo
Hard
prostate gland
Holstein Cow
5. Actual heat cycle (period)
mare estrus
retractor muscles
estrus
Size of cow in relation to the amount of milk produced
6. 147 days
reason for seasonal breeding periods
testis (gonads)
ewe gestation
prostate gland
7. What makes the milk flow through the mammary glands?
hormones
Blood
Follical Stimulating in males
mastitis
8. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
sertoli cells
elastrator
sow estrus cycle
scrotal circumference (BSE)
9. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
castration
purpose of Breeding Soundness Exam (BSE) for males
van deferens
penis sizes vs delivering methods
10. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
cowper's gland
4 major reasons for culling dairy cows
semen evaluation (BSE)
sow estrus cycle
11. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
Hormones from both the fetus and the mom.
Culls bulls earlier (2 reasons)
Sperm growth rate
burdizzo
12. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
reasons for castration
urethra
elastrator
dairy cattle pregnancy check
13. When are dairy cattle dehorned?
effects of estrogen
~1 month
estrous
monorchid
14. (switzerland) 2nd in size and milk production - most muscle -
kidney stones also called ________ ___________ can develop in the sigmoid flexure
sow gestation
Brown Swiss Cow
Bull's fibro-elastic penis
15. 26 hours after estrus begins
#1 cost in production
~1 month
ewe ovulation
castration
16. Days which have increasing daylight hours
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17. Sperm is produced here
dartos muscle
hypothalamus and pituitary gland
Avg. bull specs
seminiferous tubules
18. (LH) stimulates the Leydig cells to produce testosterone
Sperm growth rate
Lutinizing Hormone in males
urethra
ewe ovulation
19. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
why does the cow need fat deposits during pregnancy?
rectal palpation (BSE)
cryptorchid
epididymis: definition - 3 parts - 4 functions
20. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
elastrator
estrous
Lutinizing Hormone in females
testis (gonads)
21. 19-23 (21) days
epididymis: definition - 3 parts - 4 functions
sow estrus cycle
butterfat
epididymis: definition - 3 parts - 4 functions
22. FEED
estrus
things to check for in a breeding soundness exam (BSE)
#1 cost in production
cryptorchid
23. The more stressed out the male is - the less sperm he is going to produce
organs used in spermatogenesis
humans: stress level vs sperm
estrus
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
24. Luteolysis happens because of the ____________ hormone
mare's estrous cycle
prostaglandin
Avg. bull specs
dry matter and water
25. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
cremaster muscle
castration
oviducts
behavioral signs of estrus
26. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
4 major reasons for culling dairy cows
sperm cell
humans: stress level vs sperm
Where livelihood is in agriculture
27. Look for infection - split - and rupture of the penis
penis and prepuce observation (BSE)
why does the cow need fat deposits during pregnancy?
femininity of a heifer
Blood
28. Provide nourishment for the developing sperm
sertoli cells
Lutinizing Hormone in males
burdizzo
effects of estrogen
29. 265-285 days
ewe estrus cycle
Dairy Cattle Gestation
elastrator
kidney stones also called ________ ___________ can develop in the sigmoid flexure
30. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
polyestrous
femininity of a heifer
Blood
prostate gland
31. What makes the milk flow through the mammary glands?
Blood
purpose of Breeding Soundness Exam (BSE) for males
Mares
colostrum
32. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge
cervix
Grading choice
behavioral signs of estrus
leydid or interstitial cells
33. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
reason for seasonal breeding periods
cervix
cremaster muscle
castration
34. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
polyestrous
prostate gland
sow estrus cycle
cow gestation
35. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
Mares
estrous
uterus
mare's estrous cycle
36. (male) pushes the testes upward toward the body for warmth or protection
Dairy Cattle Gestation
Lutinizing Hormone in males
van deferens
dartos muscle
37. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
6-8 weeks
Lutinizing Hormone in males
testis (gonads)
38. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
uterus
prostate gland
hormones
pelvis
39. 45-60 days after breeding; re-breed as required
colostrum
dairy cattle pregnancy check
Dairy calves are removed from cow at birth to...
Sperm survival specs
40. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
mare gestation
butterfat
cervix
Dairy Cattle milking schedule
41. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
Sperm survival specs
butterfat
organs used in spermatogenesis
castration
42. (male) pushes the testes outward toward the legs for a cool-down off of the body
things to check for in a breeding soundness exam (BSE)
prostate gland
butterfat
cremaster muscle
43. 114 days
cremaster muscle
sow gestation
seasonally polyestrous
sertoli cells
44. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
cow estrus
sow estrus cycle
monorchid
age and castration
45. Prevent the cow from getting an infection from the calve
burdizzo
why does the cow need fat deposits during pregnancy?
sertoli cells
Dairy calves are removed from cow at birth to...
46. Animal which has been castrated after puberty
~1 month
seminiferous tubules
mastitis
stag
47. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Sperm growth rate
Dairy calves are removed from cow at birth to...
Holstein Cow
Sperm survival specs
48. What about the sperm for a bull which has been castrated but still has testicles?
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Jersey Cow
#1 cost in production
cow gestation
49. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
femininity of a heifer
reason for seasonal breeding periods
Reasons for gestation length being affected
Bull's fibro-elastic penis
50. (male) pushes the testes upward toward the body for warmth or protection
Size of cow in relation to the amount of milk produced
dartos muscle
monorchid
Jersey Cow
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